Improvement in horseshoe-nail machines



A n. BIN a HAM. Horse-Shoeflail Machines.

Patented Jan 14,1873

UNITED STATES PATENT Grrron ALBERT D. BINGHAM, OF VERGENNES, VERMONT.

IMPROVEMENT IN HORSESHOE-NAIL MACHlNES.

Specification forming part of Letters Patent No. 134,841, dated January 14, 1873.

To all whom it may concern:

Be it known that I, ALBERT D. BINGHAM, of Vergennes, in the county of Addison and State of Vermont, have invented a new and Improved Horseshoe-N ail Machine, of which the following is a specification:

My invention consists of a maohinecomprising two pairs of rolls with dies and one pair of plain rolls, or it may be hammers between the two pairs with dies; the firstpairhaving grooves of the width of the body of the nail to be formed and suitable depth for the thickness, with depressions at suitable intervals to formthe necessary enlargements for the heads, but only the same width as the shanks, the second pair bein g plain and arranged at such distance apart as not to atfect the shank, but to fiatdown the head to some extent; and the third having grooves of the requisite width and depth for finishing or nearly finishing the body with wider and deeper shapes for the head, to complete the reduction of the blanks which are to be formed from a rod or bar of suitable size; the blanks being connected at the heads and points when they escape from the rolls, to be separated and finished at the points by punching-dies to be used for cutting the'in 'apart and trimming or finishing the points at the same time.

Figure 1 is a plan view of a {machine such as. I propose to use for the manufacture of horseshoe-nails according to my invention. Fig. 2 is a longitudinal sectional elevation taken on the line as on. Fig. 3 is a section of parts of the finishing-rollers; and Fig. 4 is a plan view of a number of the partly-formed nails as they come from the rolls, and before being separated by the finishing-dies.

Similar letters of reference indicate corresponding parts.

A represents the first pair of rolls, to which the bar is presented through a. guide, B. These rolls have a series of dies, 0 D, in a circumferential line or groove around them, of which the parts 0 are shaped in width and depth suitably to form the body of a nail-blank, and the parts D form enlargements for the head,

which they make at right angles to the line of the greatest diameter of the finished head. E represents the second pair of rolls, to which the'blanks pass, through the guide F, after leaving: the first rolls. These rolls E have plane surfaces, and they are arranged so as to allow the bodies or shanks of the blanks to pass without affecting them, but to flatten down the enlargements for the heads. G represents the finishing-rolls, in which a series of dies, H I, are formed in the same manner as the dies of the rolls A; but the arrangement of the parts I for the heads is such that the flattening begun by the rolls E is completed, and the exact form of the finished head and the relative arrangement of it with the body part are produced by them so as to allow the metal to spread as much as required for the width, and deepened to the necessary extent and in the right form to impart the shape of a finished head, as indicated clearly in Fig. 2. Two or more series of these dies may be arranged in one setof rolls, as preferred.

For the middle dies or rollers I may of course substitute hammers; aniIpropose to do so it I find them preferable.

This manner of working the metal in forming the head will be found better than any other mode in which roller-dies are used.

If it be found necessary in practice to make the finishing-rolls a little larger than the preparatory rolls A, in order to have alittle greater surface speed to compensate for the elongation of the rod, I will make them so.

Having thus described my invention, I claim as new and desire to secure by Letters Patent The combination of a series of preparatory. roller-dies, G D, flattening-rolls E, and a series of finishing roller-dies, H I, substantially as represented in the drawing, and so as to operate upon the rod in forming the head, as

specified.

ALBERT DART. BINGHAM. Witnesses WALLACE S. HOLLAND, L. R. HANDERSON. 

